Firearm upper receiver



FIG. 1 is a front view of a firearm upper receiver.

FIG. 2 is a first side view of the firearm upper receiver shown in FIG. 1.

FIG. 3 is a back view of the firearm upper receiver shown in FIG. 1.

FIG. 4 is a plan view of the firearm upper receiver shown in FIG. 1.

FIG. 5 is a second side view of the firearm upper receiver shown in FIG. 1.

FIG. 6 is a bottom view of the firearm upper receiver shown in FIG. 1.

FIG. 7 is a first top perspective view of the firearm upper receiver shown in FIG. 1.

FIG. 8 is second top perspective of the firearm upper receiver shown in FIG. 1.

FIG. 9 is a third top perspective view of the firearm upper receiver shown in FIG. 1.

FIG. 10 is a fourth top perspective view of the firearm upper receiver shown in FIG. 1.

FIG. 11 is a first bottom perspective view of the firearm upper receiver shown in FIG. 1.

FIG. 12 is second bottom perspective of the firearm upper receiver shown in FIG. 1.

FIG. 13 is a third bottom perspective view of the firearm upper receiver shown in FIG. 1; and,

FIG. 14 is a fourth bottom perspective view of the firearm upper receiver shown in FIG. 1. 

CLAIM The ornamental design for a firearm upper receiver, as shown and described. 